Diagonal upright tubes. The top holes where they attach to the keel bracket are very elongated. I could sleeve them to repair, but see the gap between them. One is bent substancially, in more than one direction. Enough to warrant replacement with new, Big-Man diagonal upright struts, which require a pair. About $55 each...$110 total. The redish color on the one tube is a color test for a transparent red paint that closely mimics the anodized look. I could use either blue or red since the Phantom sails are red, white and blue. I think I'll go with the red.